Adjustable sound lamp and aperture support for sound apparatus



y 1934- A A. KINDELMANN ET AL 57, 73

ADJUSTABLE SOUND LAMP AND APERTURE SUPPORT FOR SOUND APPARATUS Filed. April 4, 1931 6 Sheets-Sheet l Ma)- 6141040140115 35% @AZJJ WQL/ y 1934- A. KINDELMANN ET AL 57,173

ADJUSTABLE SOUND LAMP AND APERTURE SUPPORT FOR SOUND APPARATUS Filed April 4, 1931 6 Sheets-Sheet 2 y 1934- A. KINDELMANN ET AL 1,957,173

ADJUSTABLE SOUND LAMP AND APERTURE SUPPORT FOR SOUND APPARATUS Filed April 4, 1931 6 Sheets-Sheet 3 H will INVENTOR 5' i/ef/ Mndehvann.

ATTORNEY$ ADJUSTABLE SOUND LAMP AND APERTURE SUPPORT FOR SOUND APPARATUS Filed April 4, 1931 6 Sheets-Sheet 4 7 A RN mm f O a H TM h N Ne w R E 0 o vm 5 T w a 1, a J N Q Wm 67 4, w .w WU. 1 Wm? 1 V1 N y 1, 1934. A. KINDELMANN ET AL 1,957,173

ADJUSTABLE SOUND LAMP AND APERTURE SUPPORT FOR SOUND APPARATUS Filed April 4, 1931 6 Sheets-Sheet 5 ATTORNEY! y 1934- A. KINDELMANN ETAL 1,957,173

ADJUSTABLE SOUND LAMP AND APERTURE SUPPORT FOR SOUND APPARATUS Filed April 4, 1931 6 Sheets-Sheet 6 I: R} I BY H Q: a T v AQW ATTORNEY s Patented May 1, 1934 "UNi'i'ED SEATES PATENT QFFEQE Albert Kindelmann,

Floral Park, and Ewald Bcecking, Brooklyn, N. Y, assignors to international Projector Corporation, N. Y., a corporation of Delaware New York,

Application April 2 1931, Serial No. 527,759

9 Claims.

This invention relates to new and useful improvements in talking picture projectors especially adapted for running two or more different kinds of film, for instance, 35 m/m film and 5 7i) m/m film, and has particular concern with new and useful improvements in the support and adjustment of the exciter lamp and its cooperating lens units for the projection of light on the film as it passes through a sound film trap.

An object of the invention is to provide an extremely simpl compact, durable combination of elements whereby the exciter lamp and its cooperating lens elements can be adjusted in a variety of positions with fineness and accuracy so that the production of sound is rendered most efficient and with a minimum of expenditure of time and effort on the part of the operator.

A further object is to provide a construction whereby most of the adjustment on the part of the operator merely requires him to turn a knob or handle, the setting of parts being automatic upon the turning of this element.

A still further object is to provide a construction in which the parts can be readily taken apart for replacement and repair and quickly assembled.

Further and more specific objects, features and advantages will more clearly appear from a consideration of the specification hereinafter taken in connection with the accompanying drawings which form part of the specification and which illustrate a present preferred form of the invention.

The invention in brief comprises a film trap element having light apertures therein in regis- 5 tration with the path of movement of the sound tracks on the respective film above-mentioned. 'iounted adjacent these track elements is an exciter lamp and lens combination unit, with simple means for shifting it to align with one or another of these apertures. Means are provided on the lens unit for supporting the exciter lamp therefrom with simple means whereby the lamp can be moved longitudinally to focus it or adjust it laterally and Vertically to enable the operator to place the lamp in exactly the position desired.

A further feature of the invention provides for the instantaneous substitution of one lamp for another by mere turning of a spindle for the automatic engagement of the replacement lamp in the photo-electric circuit upon being moved to its operative position.

The preferred form of the invention is shown in the drawings in which:

Fig. l is a side elevation of a motion picture projector adapted for talking picture production and embodying the invention herein;

Fig. 2 is a side elevation of that part of the projector shown in Fig. 1 which embodies the invention and shown in an enlarged form;

Fig. 3 is a plan view of the structure in Fig. 2;

Fig. 4 is a longitudinal vertical section taken on the line 4-4 of Fig. 5;

Fig. 5 is a horizontal section taken on the line 55 of Fig. i; Y

Fig. 6 is a cross section taken on the line 6-6 of Fig. 4;

Fig. '7 is a cross section taken on the line 7-7 of Fig. 8;

Fig. 8 is a cross section taken on the line 8-8 of Fig. 5;

Fig. 9 is a cross section taken on the line 9-9 of Fig. 4; and

Fig. 10 is a cross section taken on the line 1010 of Fig. '7.

The preferred form of the invention is adapted to be embodied in and form part of a modern motion picture projector in which sound is produced simultaneously with the projection of pictures. The projector embodying the invention and of modern type is shown in Fig. 1 in side elevation and comprises the following main elements, an upper film sprocket A, a projection film trap indicated at B, an intermittent film sprocket C, the upper sound film roller D, the continuously and uniformly moving sound film sprocket E, and the take-up sprocket F.

In the normal operation of the machine the film passes around the upper sprocket A, down through projection film trap B, around intermittent sprocket C over the roller D and around the sound sprocket E and take-up sprocket F into the lower magazine. As the film passes between the roller D and the sprocket E it passes through the sound film trap, the position of which is roughly indicated by the letter G in Fig. 1.

As shown in Fig. 1 the major portion of the mechanism of the projector is mounted on and supported by the vertical central partition plate 10. As far as the sound unit of the projector is concerned, it is supported from the main partition or frame 10 by means of an L-shaped plate shown in Fig. 3 and having one leg in the form of plate 11 and the other at right angles thereto in the form of plate 1 2. This bracket or support 1 is connected to the main partition or frame 10 by means of bolts 13.

Referring particularly to Figs. 4. and 5 it will be noticed that the limb 12 has an outer face 1&1 which has a slight slope to it in a direction 110 tion 01' another.

substantially transverse to the optical axis of the sound unit. This face of the limb 12 is provided with a groove having bevelled slots 15 to receive a projecting similarly shaped tongue 16. The face of the flange 16 is connected on the end of a sleeve 1'7 forming part of the sound light unit. This sleeve 17 is preferably split and has projecting lugs such as 18 connected by a clamping screw 19. Disposed within the sleeve 17 is a thin cylinder such as 20 slidable therein and acting as a support for a lens tube 21 which has similar tubular extensions such as 22 and 23 at opposite ends thereof. A threaded portion of the extension 23 such as 24 is surrounded by a threaded ring 25 bearing against the end of sleeve 20 to define the position of the lens tubes within the sleeve. On the end of extension 23 is disposed a slidable sleeve 26 having a plug 27 in one end with an aperture 28 therein. A spring 29 is disposed within the sleeve 26 between the plug 27 and the end of the extension 23. The end of extension 23 is threaded as at 30 to engage with a similarly threaded portion 31 on the inner end and inner face of sleeve 26, whereby the sleeve 26 can be prevented from slipping off the extension 23 unless it is unscrewed therefrom. Normally the action of spring 29 will permit the sleeve 26 to be moved relatively to the extension 23 back and forth.

The front face of the plug 27 and the sleeve 26 are adapted to bear against the adjacent face of a plate 32 connected on a stub shaft or stud 3 extending into a bore 34 on the bracket or support 11. This plate 32 is provided with a pair 'of spaced tapered apertures 35 and 36 of different sizes, with which the opening 28 in the plug 27 is adapted to be respectively aligned by mechanism to be hereinafter described.

Between one face of the tongue 16 and the corresponding Wall of the recess 15 is disposed a strip of friction material such as 37 which is connected by a set screw 33 bearing thereagainst and disposed in the top of limb 12. This screw will create the desired pressure on the strip 37 to regulate the ease with which the tongue 16 can be moved back and forth in the groove. As shown in Figs. 5, 7, 8 and 10, and at the end of the limb 12 of the main support or bracket, there is fastened an L-shaped plate having right-angled portions '39 and 40 fastened to the adjacent faces of the limb 12 by means of screws 41 and 42. This L- shaped plate is preferably provided with an integral hub 43 acting as a bearing for shaft 44 which carries on one end a lever 45 and at the other end a disk 46. This disk is provided with a pin 47 projecting therefrom into a vertical slot 48 formed in the adjacent face of the tongue 16. Below the pin 47 and projecting into the slot 48 is a stop pin 49 fastened to the tongue 16 and limiting the downward movement of the pin 47. As the handle 45 is turned in one direction or another, it will be seen that the pin 47 as eccentrically disposed on the disk 46 will tend to move the sleeve 1'7 and tongue 16 laterally in one direc- The limit of movement in either direction being determined by the position of stop pin 49. This motion and the relation of the pins and stop pins is determined so that in one position of the handle the lens tubes will be aligned with the opening 36 in plate 32 and in the other position will be aligned with the opening 35 in plate 32.

Clamped around one end of the sleeve 20 is a collar 50. This is tightened in positioned on the sleeve by screw 51, see Fig. 6. A plate 52 depends from the collar and is provided with a central bore 53 in which is disposed an insulating sleeve 54. Within this sleeve is disposed a metal sleeve 55. Adjacent one end of the insulating sleeve 54 is an insulating disk 56 bearing against the adjacent face of the plate 52. Against this disk 56 is a metal ring 57. Against the opposite face of the plate 52 is disposed a cup-shaped casing 58 of insulating material and a similar cup-shaped member 59. These are held together by an insulating nut 60 engaging a threaded end of a rod 61 extending through the sleeve 55 and the cupshaped casings 58 and 59.

One end of this rod 61 is slightly off-set with respect to the other and receives a cylindrical metal contact sleeve 62. Intermediate its length the rod 61 is suported by insulating blocks 63 and 64. Block 63 bears against the end of sleeve 55. Adjacent the inner face of cup-shaped member 58 is a metal plate 65 in contact with the sleeve 55 and receiving one end of a circuit wire 66. Spaced from the plate 65 by means of a washer 67 is an insulating plate 68 against which bears a metal plate 69 in contact with the rod 61. Adjacent this plate 69, the other circuit '70 is attached to the rod 61. Fastened to the end of sleeve 55 is a metal sleeve 71 extending therebeyond and having an end flange 72.

Rotatably disposed on and around this sleeve 71 is a spindle 73 having enlarged portions 74 and 75 at each end. The portion 75 has a bore receivthe spindle 73 are disposed a series of overlying curved plates such as and 81, Fig. 9, between which there is disposed the end 82 of arms having slots 83 therein. In the opposite ends of these arms are formed bores 84 acting as sockets for the exciter lamps 85. The ends of the arms are preferably split and clamped around the bases of the lamps by means of clamping screws 86. These plates 80 and 81 and the ends of the arms 82 can be tightened relatively or loosened by manipulating the screws 87 threadably engageable with the spindle 73 and having springs 88 under the heads thereof. By loosening these screws and by reason of the curvature of the plates the lamps can be adjusted in a plurality of directions to adjust them with respect to the axis of the lens tubes 21, 22, and 23. If one of the lamps in line with the tubes should suddenly burn out it is merely necessary to turn the spindle 180, which movement will bring the other lamp in alignment. The metal contact sleeve 62 mounted on the rod 61 which is the spring rod will automatically engage the center contact of each lamp as it is moved into operative position. The rod 61 is in electric circuit with the wire 70 and the other contact of the lamp is grounded on the metal portion of the apparatus which in turn is in contact with the wire 66.

In order to move the entire lamp support as a unit laterally the collar 50 is provided with an adjustable screw 90, see Fig. 6, having a groove in which lies a pin 91 fastened to a collar 92 fastened by screw 93 to the end of lens tube 21. By turning the screw the collar is rotated around the sleeve 20 after the clamping screw 51 has been slightly loosened.

In order to focus the lamp 85 and move it longitudinally, a rod 94 is fastened to the side of the collar 5c and extends into a bore in the side of the sleeve 17, the end this rod 9% is threaded and engageable by a thumb nut 95 disposed a 5 lateral slot sleeve 17. By turning this thumb =od 94 is moved longitudinally 5c, the clam ng screw 51 having been r to allow the longitudinal peration e or" the entire sound unit uring projection of the vill depend upon the size of the being used. This machin is adapted to receive films of 7G and 111/ width, or with little change it may readily accomodate other Widths. If the 2 is be used the sound unit shifted a Lows aperture being predetermined to sound track of the narrow film. 1.- :n is to he used the sound n with th -e aperture pertur is in With e Wider fi m. This plate 32 the flm sound gate the apert res there n.

O igim t The focusing the lated by t The a be turned to substitute one 1 and the loosening of swerve 87 will 12 of positions to bring them in al nment 3i; rip as it is rought -L with the to the lrn trap lm is being through the machine.

e the invention been described in detail and with respect to a present preferred form thereof it not to be limited to such details and forms since many changes and modifications may he made the invention Without departing from the spirit and scope of the invention in its broadest aspects. Hence it is desir'd to cover any and all forms and modifications or" the invention which may come within the language or scope of any one or more of the appended claims.

'v. hat is claimed, l. A sound unit for motion picture projectors supporting plate fastened to s having one leg project 'ngles to the optical axis, sleeve adjustably mounted on one face with its bore aligned tid aperture, and on the plate and engaging with said sl eve to shift ubes with the aperture 35 in the.

ith one or the other 0" 2. In a sound unit for motion picture projectors, a supporting plate, a film t ap element having spaced apertures and projecting from plate across the optical axis, a lens combination unit laterally slidalole on said plate, means for laterally moving lens combination to align it with one or the other of the apertures in the film trap element, an exciter lamp adjustably mounted on said lens combination, and means on said lens combination engaging the mounting of the lamp to move the lamp along the axis of the combination.

3. A sound unit for motion picture projectors which comprises a support, a sound trap on said support adapted to of diiierent widths, a lens combination and exciter lamp unit mounted on said support, and means for shifting said unit to a plurality of axially parallel positions to align the unit with the sound tracks of the different films, said means including means for shifting said unit longitudinally, at the same th .e, to adjust the lens with respect to the dififerent films.

4. A sound unit for motion picture projectors which comprises a film trap elem nt having a plurality of spaced light apertures therein, a lens combination structure associated with respect to said element, and means for laterally shifting said lens combination to align it with one or another of said light apertures, wh reby the sound unit may be adapted to be employed with more than one type or" sound film.

5. A sound unit for motion picture projectors which comprises a film trap element having a plurality of spaced light apertures therein, a lens combination structure associated with respect to said trap element, means for laterally shitting lens combination to align it ith one or another of said light apertures, an exciter lamp unit mounted on and movable with the lens combination.

6. A sound unit for motion picture projectors which comprises a rim trap element having a p ality of spaced light apertures therein, a lens combination structure associated with respect to said trap element, means for laterally shifting said lens combination to align it with one or another of light apertures, an eXclter lamp unit mounted on and movable with the lens combination, and means to adjust exciter lamp unit with respect to the lens combination.

'7. A sound unit for motion picture projectors which comprises a film trap element having a plurality of spaced light apertures therein, a lens combination structure associated with respect to said trap element, means for laterally shifting said lens combination to align it v/i-h one or another of said light apertures, a photo-electric cell also associated with said trap element and means for adjusting the cell with respect to said light apertures.

8. A sound unit for motion picture projectors which comprises a film trap element having a plurality of spaced light apertures therein, a lens combination structure associated with respect to said trap element, means for laterally shifting said lens combination to align it with one or another or" said light apertures, an exciter lamp unit, means for adjusting the lamp unit with respect to the lens combination, a photo-electric cell, 15Q

other of said light apertures, an exciter lamp unit supported from the lens combination, means for adjusting the lamp unit with respect to the lens combination, a photo-electric cell, and means for adjusting the cell with respect to the light ape1= tures.

ALBERT KINDELMANN.

EWALD BOECKING. 

